WHY THIS HAPPENS

This occurs due to sudden appearance of three possible rhythms in heart

1-Ventricular fibrillation

2-Ventricular tachycardia

3-Asystole

WHAT IS VENTRICULAR FIBRILLATION  ?

Ventricular Fibrillation (VF), the abnormal heart rhythm that most often leads to sudden cardiac arrest, is treatable. If the heart can be shocked quickly with a defibrillator, a normal heart rhythm may be restored. An automated external defibrillator (AED) is a portable device used to administer an electric shock to the heart and restore the heart's normal rhythm during sudden cardiac arrest. 

It is essential that defibrillation be administered immediately following the cardiac arrest. If the heart does not return to a regular rhythm within 5-7 minutes, this fibrillation could be fatal. If defibrillated within the first minute of collapse, the victim's chances for survival are close to 90 percent. For every minute that defibrillation is delayed, survival decreases by 7 percent to 10 percent. If it is delayed by more than 10 minutes, the chance of survival in adults is less than 5 percent. 


 LOST TIME IS NEVER FOUND AGAIN 

The propensity to die suddenly relates to genetic or acquired changes in the electrical or mechanical properties of the heart with multiple transient factors that participate in triggering the fatal event.

50% of cardiac arrests occur in individuals without a known heart disease, but most suffer from concealed ischemic heart disease or genetic diseases, which could be diagnosed easily by proper awareness and medical screening.

WHAT IS VENTRICULAR TACHYCARDIA?

Is a type of fast heartbeat that arises from abnormal electrical activity in the lower chambers or ventricles of the heart.  This rhythm is more organized as compared to ventricular fibrillation but may turn into ventricular fibrillation or itself lead to hemodynamic instability and cardiac arrest. It is found initially in about 7 % of people with cardiac arrest.

In diseased-scarred hearts and weak hearts with poor pumping capacity, patients with coronary artery disease or certain electrical problems of heart are associated with increased risk of ventricular tachycardia.

This is an emergency and immediate defibrillation is needed in most of cases.

WHAT IS ASYSTOLE?

Asystole is a state of no electrical activity from the heart and therefore no blood.On ECG you will see a flat line .It is found in about 28 % of people in cardiac arrest. Out of hospital survival rates are poorest in asystole and less than 2 %.


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